I have found that, like salespersons, internet vehicle specs should be verified in the Owner's Manual before investment.
Just a reminder, remember that air shocks, air springs and overload springs do stiffen the ride of a vehicle but do NOTHING to correct the weights -- They merely jack up the rear body with no discernible effect on the suspension, esp the front end -- You could get the same leveling effect by inserting a 2x4 wedge between the rear springs and frame...
Don't believe it? First, read the fine print on Air Springs and what the manf says not to expect -- Next, find someone with air springs or air shocks, park the vehicle on a split-platform scale and air the suckers up and down, watching the weight
on the front end.
These things have their uses, but transferring rear axle
weights to the front is not one of them.